Więckowski, P. “Scientific Hedonism As a Basis for the Critical Assessment of the Social Transformations – Richard Layard’s, Mark Anielski’s and Richard Easterlin’s Economy of Happiness”. Annales. Ethics in Economic Life, vol. 14, no. 1, Jan. 2011, pp. 127-3, doi:10.18778/1899-2226.14.1.12.